In this hadith, they did not make correct translation. It clearly says that rebillous group will kill him ( تَقْتُلُهُ الْفِئَةُ الْبَاغِيَةُ. They put the things in bracket and try to their best to play with the translation , so the people would not understand exactly. This hadith also says that Ammar will invte them to paradise but those peole will invite Ammar to hell fire.

This hadith is also in Tarimdhi which is graded as sahi in Tarimdhi (chapter virtues of Ammar bin Yasir)The person who translated Tarimdhi from Arabic to Urdu ( Badi ul Zaman-brother of Wahid ul Zaman) admitted that this hadith goes against Moawiya but we are not suppose to talk bad about Sahaba.

Everybody knows who killed Ammar bin Yasir (rz). Ammar Yasir was killed in the battle of Safeen (between Imam Ali and Moawiya), Muawiya's people killed Ammar bin Yasir (rz). This hadith clearly annouces about Muawiya and his people that they will invite people to hell fire.

Our Sunni fellows claim that Companions are like guiding stars, follow anyone you will be guided. This hadith goes gainst Sunni ideology, We can clearly see in this hadith that Muawiya and his group (fillied with companions) will invite towards hell. Please read our article Sunni point of view about Companions Shia point of view says when the holy Prophet knew it the my companions will fall in to afflictions and they will have the greed of government. The Prophet must do some arrangement for them after him.

But Sunni point of view says neither the Prophet introduced any system who will be the leader not Prophet himself appointed anybody Caliph.